Skip to main content

Table 1 Examples of technologies for the removal or mitigation of arsenic [Sources: [26, 27]]

From: Are interventions to reduce the impact of arsenic contamination of groundwater on human health in developing countries effective?: a systematic review protocol

Technology (Intervention)

Mechanism of action

Pre-oxidation of arsenic(III) to arsenic(V)

By transforming to one form of arsenic, simplifies arsenic removal by other means

Precipitation and coagulation

Co-precipitation of water insoluble arsenates and inorganic oxides of other metals


Granular adsorptive media


Filtration, electrical repulsion and adsorption

Ion exchange

Water passes through an ion exchange resin which removes arsenic by exchanging it for non-toxic ions.

Biological removal

Sorption and oxidation, e.g. through bacteria, fungi and hyacinths


The top of shallow aquifers, at less than 10 m, appear to be less contaminated than deeper water.

Deep tubewells

Tubewells sunk below the layer of sediment considered to contain arsenic

Reverse osmosis

Contaminated water is forced through a membrane. The treated water passes through leaving the arsenic ions on the membrane


Similar principle to reverse osmosis, with a nm pore size